feat: add tools

[BatLeDev]

✨ New MCP Tools

Added several commands to interact with DataFair:

• search_datasets – search datasets using full-text search
• describe_dataset – retrieve detailed metadata for a dataset
• search_data – search data rows using full-text search or precise filters
• aggregate_data – aggregate data from a dataset

⚙️ CI/CD Improvements

• Added GitHub Actions workflows to automate checks, Docker builds, and deployments
• Standardized steps for commits, pull requests, and releases

🐳 Modernized Docker

• Updated to Node.js 24
• Optimized build stages to reduce image size
• Removed deprecated flags and simplified entrypoint arguments

📚 Improved Documentation

• Updated README and contribution guidelines to better explain:
  • Project installation and configuration
  • Available npm scripts
  • Development best practices

🛠️ Better Developer Experience

• Added new npm commands to simplify common tasks
• Improved Zellij configuration to match the new dev workflows